Bookmarks with Numbers 1 - 6
In two sizes, 150mm (6 inches) and 75mm (3 inches) long.
Also useful as paperclips.
Just 0.75mm thick so they should not damage your book.
See also my Alpha Bookmarks thing:4133497
If you need other numbers or a custom design then please "tip designer" and let me know of your requirements.
0.20 or 0.25 layer height
. PLA or any
These look better if you pause the print and change the filament colour when it starts to print the numbers.